mirror of
https://github.com/go-i2p/go-i2p-bt.git
synced 2025-07-13 11:54:35 -04:00
37 lines
1.1 KiB
Go
37 lines
1.1 KiB
Go
// Copyright 2020 xgfone, 2023 idk
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package utils
|
|
|
|
import "io"
|
|
|
|
// CopyNBuffer is the same as io.CopyN, but uses the given buf as the buffer.
|
|
//
|
|
// If buf is nil or empty, it will make a new one with 2048.
|
|
func CopyNBuffer(dst io.Writer, src io.Reader, n int64, buf []byte) (written int64, err error) {
|
|
if len(buf) == 0 {
|
|
buf = make([]byte, 2048)
|
|
}
|
|
|
|
written, err = io.CopyBuffer(dst, io.LimitReader(src, n), buf)
|
|
if written == n {
|
|
return n, nil
|
|
} else if written < n && err == nil {
|
|
// src stopped early; must have been EOF.
|
|
err = io.EOF
|
|
}
|
|
|
|
return
|
|
}
|